Are there some config files I need to delete that aren't in the main folder? Whenever I open the program file, either from the custom .bat OR the Steam overlay, nothing happens. In the overlay, it shows me in game for a few seconds and then goes back to normal. In the overlay, it just gives me the "SRCDS closed or crashed, restarting" message.

I've uninstalled/deleted my SRCDS folder multiple times with no luck. Validating doesn't do anything, either, and I've got a server up before. I just can't since the Wave 666 MvM update, and neither can my friends.

Update: Okay, this is getting really weird. Tried the HLDSUpdateTool, and it even it made the directory folders I told it to...with nothing in them. (Edit: Okay, that was fixed. SRCDS still won't run, though.)